ameliorate

ameliorate, amend, better, enhance, enrich, help, meliorate, perfect, refine, upgrade

correct, emend, rectify, reform, remediate, remedy; edit, fine-tune, redraft, refurbish, rehab, rehabilitate, revamp, revise, rework; beef (up), boost, fortify, intensify, reinforce ( reenforce), strengthen; fine, hone, polish; retouch, touch up

damage, endamage, harm, hurt, impair, injure, spoil, tarnish, vitiate; blemish, blight, deface, disfigure, flaw, mar; diminish, lessen, lower, reduce